14-62987121-G-A

Position:

chr14-62987121-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BP4BS2

The ENST00000322893.12(KCNH5):c.500C>T(p.Thr167Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000229 in 1,613,436 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. T167T) has been classified as Benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

KCNH5
ENST00000322893.12 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.65

Variant links:

Genes affected

KCNH5 (HGNC:6254): (potassium voltage-gated channel subfamily H member 5) This gene encodes a member of voltage-gated potassium channels. Members of this family have diverse functions, including regulating neurotransmitter and hormone release, cardiac function, and cell volume. This protein is an outward-rectifying, noninactivating channel. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

KCNH5 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), KCNH5. . Gene score misZ 2.509 (greater than the threshold 3.09). Trascript score misZ 3.7308 (greater than threshold 3.09). GenCC has associacion of gene with infantile-onset epilepsy.

BP4

Computational evidence support a benign effect (MetaRNN=0.37799177).

BS2

High AC in GnomAdExome4 at 36 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
KCNH5	NM_139318.5 linkuse as main transcript	c.500C>T	p.Thr167Met	missense_variant	5/11	ENST00000322893.12	NP_647479.2
KCNH5	NM_172375.3 linkuse as main transcript	c.500C>T	p.Thr167Met	missense_variant	5/10		NP_758963.1
KCNH5	XM_047431275.1 linkuse as main transcript	c.500C>T	p.Thr167Met	missense_variant	5/10		XP_047287231.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNH5	ENST00000322893.12 linkuse as main transcript	c.500C>T	p.Thr167Met	missense_variant	5/11	1	NM_139318.5	ENSP00000321427	P1	Q8NCM2-1
KCNH5	ENST00000420622.6 linkuse as main transcript	c.500C>T	p.Thr167Met	missense_variant	5/10	1		ENSP00000395439		Q8NCM2-2
KCNH5	ENST00000394964.3 linkuse as main transcript	n.665C>T		non_coding_transcript_exon_variant	5/7	1
KCNH5	ENST00000394968.2 linkuse as main transcript	c.326C>T	p.Thr109Met	missense_variant	5/11	2		ENSP00000378419		Q8NCM2-3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152092

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000279

AC:

AN:

251236

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135778

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000218

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000246

AC:

AN:

1461344

Hom.:

Cov.:

AF XY:

0.0000316

AC XY:

AN XY:

726968

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000279

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152092

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74280

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000936

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Early infantile epileptic encephalopathy with suppression bursts

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 31, 2021

This sequence change replaces threonine with methionine at codon 167 of the KCNH5 protein (p.Thr167Met). The threonine residue is moderately conserved and there is a moderate physicochemical difference between threonine and methionine. This variant is present in population databases (rs771253745, ExAC 0.02%). This variant has not been reported in the literature in individuals affected with KCNH5-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C15"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.018

BayesDel_noAF

Uncertain

0.030

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.36

T;.;.

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.38

T;T;T

MetaSVM

Pathogenic

1.1

MutationAssessor

Benign

1.9

L;L;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-1.0

N;N;N

REVEL

Uncertain

0.64

Sift

Uncertain

0.0070

D;D;D

Sift4G

Uncertain

0.019

D;D;D

Polyphen

0.99

D;P;P

Vest4

0.52

MutPred

0.40

Gain of catalytic residue at M169 (P = 0.0178);Gain of catalytic residue at M169 (P = 0.0178);.;

MVP

0.64

MPC

1.2

ClinPred

0.34

GERP RS

5.7

Varity_R

0.11

gMVP

0.53

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over